I created pandas, co-created Apache Arrow and Ibis, and wrote Python for Data Analysis.
Founder at Kenn Software · Part-time: GP at Composed Ventures, Principal Architect and AI at Posit · Apache Member · Blog · Previously: Two Sigma, Cloudera, DataPad
What I'm building now is at kenn.io.
I support open-source data science through NumFOCUS and donate at least $1000/year.






